Paddy will be joined by Labour leader of the House of Lords Baroness Royall (had you heard of her?), Tory shadow secretary of state for defence Liam Fox (y’know the one who tells those tasteful jokes about the Spce Girls), journalist and historian Sir Max ‘fusty-but-rather-wonderful’ Hastings, and ex-GMTV presenter Fiona Phillips.

If you’re tuning in, you can join the simultanous online Twitter debate here at #bbcqt, or the LDV debate in the thread below. Meanwhile Lib Dem blogger Mark Thompson will be liveblogging events via CoverItLive at his own blog.